package usb;
import java.util.Scanner;
public class Test01 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入成绩：");
       int score=sc.nextInt();
       if (score>100||score<0){
           System.out.println("输入错误");
       }else {
           if (score>=90){
               System.out.println("优秀");
           }else if (score>=80){
               System.out.println("良好");
           }else if (score>=70){
               System.out.println("中等");
           }else if (score>=60){
               System.out.println("及格");
           }else {
               System.out.println("不及格");
           }
       }

    }
}
